Drum mounting for boilers



July 25, 1933.

M. L .lPTAK DRUM MOUNTING FOR BOILERS .Mic/raeiLi e 06.

Filed Aug. 25

Patented July 25, 1933 fimonnnnn r'rnx, or s r. riaunlrirmrnsorn y "DRUM MOUNTING'FoR BOILERS r Application filed August-J25, 1930.1 seriarno. 1471785;-

My invention relates to boilers of the bent tube type and is directed to an improved drum, mounting especially adapted for the mounting of mud drums of such boilers. Generally stated, the invention consists of the novel devices, combinations of devices and arrangement of parts hereinafter described and defined in the claims. In boil ers of the above indicated type, the,inud drums are hung below the upper drums and areconnected thereto by a verylarge 11111117 ber of water tubes. tubes because of their Varying lines and extent of expansion and contraction, tend to shift the mud drum transversely ofits axis,

laterall upwardly and-downwardly. When the ensof the mud drum areset 'intorthe furnace walls against unyielding "refractory blocks or-material, the strains put upon the mud drurnnlwill frequently crack the unyielding refractories "and cause leaky joints between the water tubesand mud drum. To avoid this; a yielding pack such I as asbestosrope has been placed in the joint between the mud drum and the surrounding unyielding; refractories, but this has) not been found very satisfactory for thereason that such packing being veryeasily compressed, will allow themetallic partsof the drumto settle onto or against the unyielding refractories and at the sametime will open up joints between the drum and the refractories. Y

*Myinvention prdvidesa greatly improved structure which is capable of being manu- ,fact'ured at comparatively lowcost andr'apj idly and accurately'erected and which, when i installed, will be durable and, highly e'flicient under all conditions.

I'Several [commercial embodiments of. the invention are illustrated'in the accompanying drawing, wherein like characters indicate like parts throughout the's everallvi'ews.

I? Referring to thefdrawing;

Fig.1 is a viewchiefly' in elevation but with some partssectioned ontheline" 1 1 of Fig, 2 and with some parts broken away showing the muddrum, the furnace wall and 150 the improved m un ng;

These numerous water structure.

n a Fig, 21s agsection-taken on the line 2-;2 of Fig, 1 7 y y FigL is a fragmentary section taken on the sameline as Fig. 2, but with parts" broken away and with the lower portion of the drum andwall on a largerlscalefthan i n g-fl; i T Fig. 4 is a perspectiveview showing one of the pliable refractories that form a ring contacting with the drum; y 1.

h Fig. 5 is aperspectiv showi gone 'ofthe refractory tiles that form a ring surrounding the ring of pliable refractories; Fig. 6 is a view corresponding to Fig.3 but illustrating a slightly modified struck ture; and

Fig. 7213 a View corresponding o Fig.6

illustrating a still furtl1er"'s1ightly modified The mud drum illustrated in Figs. 1, 2 and 3 is of atype'wherein the'eylindrical drum shell 8 is provided with heads 9Ilapped V therewith and secured thereto with air tightjoints by rivets 10. 'The outer drum head?) is providedwith a customary manhole 11 adapted to be normallyjclosed by a suitable manhole cover not shown." Theqwa'ter tubes that connect the mud drumto the up 7 per drums, not shown, are indicated by the numeral 12and thes'e,as is customary, are 1 closelyfspaced both circumferentially of the drum and axially of the drum. The wallin which the outer end of the mud drum-is mounted is shown as madeiup -chiefly of outer common brick 13 and inner fire brick 14, but" the outer" wall portion-l3 includes commonbrickortile 15 arranged to form an annular ring or layer, the interionof whlch as shown is concentric with, and approximately thesame diameter as" the ex terior'ofthe drumS'. y V

The drum mounting is made up ofanin net; layer of blocks 16 of an outerlayer of blocks 17. The blocks 16' are circuinferentially disposed in the form of a ring around andin'contact with the exterior of the end ofthe druni-S and the outer block 17, are circumferentially disposedin the form of a ring around and in contact with the inner blocks 1 The inner blocks s 2 ring formation.

are of a highly refractory pliable material such as asbestos, magnesia or combinations of these or similar highly refractory pliable materials. In building the mounting into the wall structure I have found it advantageous before the wall is built close to the drumto adhesively secure the blocks 16 to the exterior surface of the drum by the use of silicate of soda (liquid glass) or other suitable adhesive material, the function of which-is only to hold the blocks in position temporarily and while the wall and mounting are being completed. As the wall is built up close to the mounting the lower blocks 17 of the outer mounting ringv are placed in position and settle tile 19 are set in place under these lower and first set blocks 17. These settle blocks 19 are triangular in form and-are formed with upper concave surfaces that correspond in their curve to the exterior surface of the outer ring. The other blocks 17 of the outer ring are laid in position only slightly in ad- I Vance of the building of the wall structure.

A filling material'2Q of dry mineral wool, cement or the like is placed in the annular joint space formed around the head of the drum just outward of the inner blocks 16 and inward ofthe blocks 15.

The inner blocks 16 on their inner faces are formed with anchoring grooves 21 that extend circumferentially of the drum and receive the outer heads of the rivets 10,

' thereby lockingthe blocks 16 to the drum,

against movements longitudinally, of the drum-but with freedom for ad'ustments aroundthe drum so that said blocks can assume the proper. positions in the inner This. groove structure is shown in Figs. 1, 2, 3, ,4: and 6. To interlock the inner blocks 16 to the outer blocks 17 the former are sho'wn as provided with outwardly bulged surfaces, 22 that engage correspondingly concaved surfaces 23 formed in the inner edges of the outer blocks 17.

These engaging surfaces 22 and 23 lock the 1 blocks 17 to the blocks 16 against movements longitudinally of thedrum, but permit said blocks 17 to be adjusted circumferentially so that they assume their-proper positions in the outer ring formation. Preferably, th e blocks, 16 and 17 are slightly wedge-shaped or tapered inwardtoward the axis of the drum. The contacting or facing surfaces of the blocks 17 are formed with grooves 24-and ribs 25 that engage the reverse formations of adjacent blocks and.

interlock said blocks against independent rad al movementsand also form lap joints.

The interlocking structure is found in the structure illustrated in Figs. 1, 2, 3, 4 and 5. The structure illustrated in Fig. 6 differs from that illustrated in Figs. 1 to 5, inclusive,- only in that the interlocking engagement 22-23 between the inner blocks 16 and the outer blocks17 is omitted. The structure illustrated in Fig. 7 differs from the structure illustrated in Figs. 1 to 5, inclusive, in that the drum 8? there illustrated has an integral head 9 and the rivets being omitted interlocking engagement between the drum and the blocks 17 is omitted.

The blocks 16 and 17 may be laid either with or without cement between their oints but preferably high temperature cemented joints will be used. The blocks 16 and 17 have such relatively short circumferential length or width that by varying the cement between the joints or the angle between joints where cement is not used, they may be laid in substantially true circles of varying diameterso that the same blocks can be used as a mounting for drums that vary consid erably in diameter. When the blocks are laid as described, it is evident that they will be securely held in proper drum-supporting formation regardless of various lateral, vertical, upward, downward and angular movements of the drum in its mounting. Of course, the movement of the drum in its mounting will not be great but sufficient, as already noted, to cause great damage to the parts where there is no yielding action. The pliability Orresiliency in the inner blocks 16 will permit the above noted and required movements of the drum and at the same time will maintain good contact with the drum. and will maintain tight joints regardless of the drum movements. I Also, the drum mounting willresist high temperatures and will be found strong and durable. It is of such character thatit may be laid up or installed rapidly and it is practically foolproof in that it'cannot be laid up improperlyf Obviously, various alterations or changes in the details of constructionand arrangement above described may be made without departing from the spirit of the invention as herein disclosed and broadly claimed.

What I claim is: I

1. A drum mounting adapted for application around the end of a drum and for application within a furnace wall, compris- 2. The combination with a furnace wallandra drum extended into said wall, of a drum mounting comprising concentric layers of blocks forming concentric rings applied in said wall around said drum, certain of said blocks being of highly refractory liable material permitting the drum to a shift in the directions radiating from the axis thereof, and settle blocks having con-v cave surfaces seated under and against outer surfaces of the outer layer of said blocks. m3. A drum mounting adapted for applia layer of highly refractory pliable inner blocks for application in ring formation around the drum, an outer layer ofrigid f refractory blocks arranged fo'r japplication inring formation around said inner blocks,

and settle blocks having. concave surfaces seated under and against outer surfaces of the outer layer ofsaid blocks.

4. The combination with drum mounting comprising'a layer of high- I 1y refractory pliable inner blocks applied.

in said wall directly around an end of said drum, and an outer layerof rigid refractory blocks applied in said wall and arranged in ring formation directly-and concentrically arounds'aid inner blocks, and in which said inner and outer blocks have interlocking surfaces extended circumferentiallyof the ring formation. a l i 5. The combination with a furnace war and a drum extended into said wall, of a drum mounting comprising a layer of highly refractory pliable. inner blocks applied in said wall directly aroundan end of said drum, and an outer layer of rigid refractory I blocks applied in said Wall-and arranged in ring .formation directly and concentrically around saidinner blocks, said drum at its end portionhaving projecting rivet heads and said innerblocks on their inner surfaces having grooves that receive and interlock with the projecting rivet heads, said inner and outer blocks having interlocking surfaces extended circumferentially of the ring formation. i

6 The combination with a furnacewall and a'drum extended into said wall, of a drum mounting comprising a layer of high: 1y refractory pliable inner blocks applied in said wall directly around an end of said er blocks being interlocked against movements longitudinally of the drum.

7. The combination with a furnace wall and a drum extended into saidwall, of a drum mounting comprising a layer of high- .ly refractory pliable-inner blocks applied in said wall directly around an end of said drum, and an outer layer of rigid refractory blocks applied in said wall and arranged in I 5. a ring formation directly and concentrically .furnace wall and a drum extendedinto said wal1,1of a drum, and an outer layer .of rigid refractory blocks appliedin said wall and arranged in ring formation directly and concentrically around said inner blocks, said inner blocks beinginterlocked to said drum against movements longitudinally thereof but with freedom for adjustment circumferentially thereof, and said outer blocks being interlocked to said inner blocks against movements longitudinally of the drum but withffreedom for relative circumferential adjustments.

9. The combination with a furnace wall and a cylindrical drum extended into said 7 wall, of a drum mounting comprising concentric layers of blocks forming concentric rings applied in said wall around the cylindrical portion of said drum, certain of said blocks being of highly refractory pliable material, permitting the drum to shift in directions radiating from the axis thereof, said ring-forming blocks being interlocked to each other and to the drum against movements longitudinally ofthe drum.

MICHAELLIPTAK. 

